Mining machine



Fei. 28, 1928.

Original Filed Dec. 17, 1923 T. E. PRAY MINING MACHINE 3 Sheets-Sheet 2Feb. 28, 1928. Y

T. E. PRAY MINING' MACHINE Original Filed Dec. 17, 1923 5 Sheets-Shee'c5 lllilihlll (ill "which meansmayy comprise a plurality of "tions of thecoacting threaded members with their respective elements aiiordingcompensation for the slight variations in the normal parallelrelationship Aof vthe main frame and the axle bolster. v

The front axle 14 is also mounted lin a bolster extending between thesupporting VVwheels 16, 16 and provided with a trunnion connection inalignment with the trunnion connection of the rear axle 13 so as topermit the main frame to tilt on a coimnonlongitudinal axis when thelongitudinal tilting adjustment is'manipulated. `This trunnionvmechanism on the'ront axle 14 comprises a pair of pins 46, 46 extendingbetween supporting members 47, 47 integral with the front bolster 45vand having a socket 48 spanning the axle and provided with arms 49,49bearing on said pins. (See Figures v 2-and 4f.)

with means for tilting the main frame on a The forward axle is alsoprovided transverse axis which in the present construction comprises avthreaded screw meinber 50 carried by the socket 48 before described, andextending upwardly therefrom into threaded engagement with a socketmember-*51 rotatably mounted ,inv a` down# wardly extending boss' 52formed integral with the main frame. The turnin'gmember is provided withmeans for rotating the saine which may comprise al plurality ofprojecting arms having sockets 53, 53 therein yfor engagement by aturning bar or handle in a Vsimilar manner to that already describedr in.connection with the. longitudinal adjusting mechanism. It will beobserved that'the raising or lowering of the main frame relative to thefront axle causes the entire trame to be tilted upon a transverse axiswith `the rear axle and supporting wheels forming the ulcrum. y

The adjusting devices relative to the two axles provide Aa simple andefficient means for tilting'the cutter arm either on a transverse or alongitudinal axis, all of the mechanisms being coinpactly locatedbeneath the main iframe so' as to require a minimum overall height ofthe entire apparatus. front axleis free to rock on a longitudinal axisrespective tothe rear axle thereby afording relative flexibility of theaxles when traveling over uneven track.A 'f

' Although I have shown and described one form in which my invention maybe embodied,fit will be understood that the'ardo not wish toillustrated, except asit may The Y rangement and construction of ythevarious parts may be altered withoutdeparting from `the spirit and scopethereof. Therefore I be understood as limiting myselfv to the particularconstruction herein lbevspecificall i iited in the appended claims.

I claim as my invention: v

1.In a mining machine provided with a pair of supporting axles havingwheels thereon,and a main frame above said axles carrying a turntable, acutting eleinentsup- Y ported on said turntablevkto cut across the Jrontoi' said main frame, the combination of tilting mechanisms linterposedbetween each of said axles and said main trame and below said turntableto permit independent relative movement-of said axles and said traine ontransverse and longitudinal axes.

2. In a mining machine provided with a pair of supporting axles having`wheels thereon, and a main tram-e above said axles carrying aturntable, a cutting element supported on said turntable to cut acrossthe 'front ot said main yframe, the combination of. tilting rmechanismsinterposed between each of said axles andsaid'niain Jframe and belowsaidturntable to permit independent relative movement ot said axles andsaidv frame on ktransverse and longitudinal axes, and means connectedwith one olisaid axles for controlling the tilting movement on a ilongitudinal axis.

` 3. In a mining machine provided with a pair of supporting axleshaving. wheels thereon, and a main frame above said axles carrying aturntable,'a cutting element supported on said turntable to cut acrossthe i'ront of said main frame, the'combination of tilting mechanismsinterposed between each of said axles and saidvmain frame and below saidturntable to permit independent relativ-e movement ot said axles andsaid frame on transverse and longitudinal axes, and-means connected withone otsaid axles for controlling the tilting movement about the axis ot'the other axle. I

4. In a mining machine provided with a.

pair of supporting axles having wheels thereon, and a main frame abovesaid. axles carrying a cutting element movable to kcut across theirontotlsaid frame, the Acombinaiet tion ot tilting mechanismsinterposed ybef tween each of said axles andsaid mainframer to permitindependent relative movement ot said axles and'saidframe ontransverse'and longitudinal axes, and a single controlling meansconnected withione ot said axles for controlling the til-tingy movementon a longitudinal axis and a second controlling means connected withtheother of said axles for controlling the tilting movement labout the axisof the first named axle.

5. In a mining machine provided with a pair of supporting axles having lwheels Ameans connected with i longitudinal axis,

ycutting element supported thereon, and a mainframel above. said axlescarrying a cutting element movable to cut across the front of saidframethe combi-nation of tilting tween each of said axles and said mainframe to permit independentrelative movement of said axles andsaidframeon transverse and longitudinal axes,l anda singlefcontrolling.therear' axle for, con trolling the tilting movement on alongitudi-l nalaxis and a second controlling-means con nected. Vwith the yfro-nt axle`for, controlling the tilting movement on a'v transverse axis.

'6.1111 a miningmachine providedwith a pair of supporting axles having'i wheels thereon, and a main fraineiabovesaid-axles .carrying ak cutting element movable jto `cut across the front of said frame,` thecombination of tiltingrinechanisms interposed ybetween each of said:axles and said mainframe i topermit independent relative'moveinent ofsaid axles and said frame on.; transverse and longitudinal axes, 1 and asingle i vcontrolling means disposed centrally of the front axle andbeneath the main frame for controlling the tilting movement on atransversevaxis.

7. In a mining machine provided with a pair of supporting axles havingwheels thereon, and a main frame above said axles carrying a cuttingelement movable to cut across the front of said frame, the combinationof tilting mechanisms interposed between each of said axles yand saidmain frame and within the boundaries of the lat-` ter to permitindependent relative movement Vof said axles and said frame ontransverse and means disposed and longitudinal axes,l adjacent one sideof the rear axle to control the tilting movement on a longitudinal axis.

8. In a mining machine, a main frame, a cutting element supportedthereby, movable to cut across the front of said frame a pair ofsupporting axles and wheels mounted within the boundaries of the'V maintrameY having independent bearing means therefor, means pivotallylconnecting each of said bearing means with said mainframe on a andcontrolling means interposed between one of said bearing means and saidmain frame.

9. In a mining machine,

thereby, a pair of supporting axles and wheels mounted below the mainframe having independent bearing means therefor, means pivotallyconnecting each of said bearing means with Vsaid main frame on alongitudinal axis, and'controlling means interposed eccentrically' ofsaid longitudinal yaxis between one of said bearing means and said mainframe.

10. In a mining machine, a main frame, a cutting element supportedthereby, a pair of supporting axles andwheels mounted below the mainframe Yhaving independent bearing means therefor, means pivotallyconmeclianisms interposed becontrolling lmeans Vconnection on the otherof main-frame for raising and lowering saidy .means therefor, means amainv frame, a Y

necting each of said bearing means lwith said trolling means interposedeccentrically of sai-d longitudinal axis betweenthe bearing meansforlone of said axles and said main frame and other; controllino' meansinterc a .x c

posed` between the pivotal connectionon the il'ow. ,the main framehaving independent .bearing means therefor,

means pivotally mainframe` on alongitudinal axis, con-y connecting eachof said bearing means with said vmain frame on .a longitudinal axis,

interposed eccentrically of said longitudinal axis V,between thebearingpmeans for the rear axle yand said main frame,I and othercontrolling means interposed between the@ vpivotal ibnnec'-v tion on thebearing means for the front axle and said mainframe for raising and'lowering the main frame bodily with respect to said axle.

12. In a mining machine, a main frame, a cutting element supportedthereby, apair of supporting axles and wheels mounted below the mainframe having independent bearing means therefor, means pivotallyconnecting with said main,

each of said bearing means frame on a longitudinal axis, screw devicesinterposed eccentrically of said longitudinal axis between thebearingmeans for one of said` axles and said main frame, and other screwdevices interposed 'between the pivotal said axles and the main framebodily with respect to said axle.

13. In a mining machine, a main frame, a cutting element supportedthereby, a pair of supporting axles and wheels mounted below the mainframe having pivotally connecting each of said bearing means withsaidmain frame on a longitudinal axis, screw devices interposedeccentrically of said longitudinal axis between the bearing means forthe rear axle and said. main frame, and other screw devices interposedbetween the pivotal connection on the bearing means for the front axleand sai-d main frame for raising and lowering the main frame bodily withrespectto said axle.

14. In a mining machine,'a main frame, a

turntable, a cutting elementy supported there.- by, a pair of supportingaxles and wheels mounted below the main frame having independentblearing means therefor, means pivotally connecting each of lsaidbearing means with said main frame on a longitudinal axis, tween one ofsaid .bearing means and said main framebeneath said turntable.

and screw devices interposed be'- independent bearing Y pivotally connec'ng veachA of said bearingl means with saidmain' frame on a longitudi-.'framq, pivotal connections imeans with said main nal axis, and screwdevices interposed eccentrically of said longitudinal axis between oneof said bearing means and `said main frame beneath said turntable. v

16. In a mining machine, a main frame, -a turntable, a cutting elementsupported thereby, apair of supporting axles and wheels mounted belowthe main frame having independent bearing means therefor, meanspivotally connecting each o saidl bearing frame on a longitudinal axis,screw devices interposed between one of said bearing means and said mainbetween said screw ydevices and bearing means and other pivotalconnections between said screw devices and said mainframebeneath saidturntable. p l

17. In a mining machine, a main frame, a turntable, a cuttingelement,supported'thereby, a pair of supporting axles and wheels mountedbelow the'main frame having independent bearing means therefor, meanspiv- Aotally connecting each of said ybearingv means withY said mainframe on a longitudinal axis, screw devices interposed between the rearbearing means and said main frame, pivotal connections between saidyscrew'devices and the rear bearing means, nections between said screwdevices and said main frame, and other screw devices interposed betweenthe pivotalV connectionof the front bearing means and said main Jframeall of said screw devicesbeing located beneath said turntable.

other pivotal con- I Signed at Chicago, in the county of CookV` i andState of Illinois,

thislth day of December, A.` D. 1923. f Y Y THOMAS E. PRAY.

